1.	Simplify 1 Simplify the following expression: $$ \left(-1 + -3 - \left(-2 + 1\right)\right)2(-4)(-5) $$ Correct Answer $$ -120$$ or -120.000

2.	Simplify 2 Simplify the following expression: $$ \frac{{2}^{1} + 6 - 6}{2(-2)(-3)} $$ Correct Answer $$ \frac{1}{6}$$ or 0.166667

3.	Fractions 1 Simplify the following expression: $$ \frac{2}{6} - \frac{-2}{3} $$ Correct Answer $$ 1$$ or 1.0

4.	Fractions 2 Simplify the following expression: $$ \frac{2}{3}\frac{-1}{2} $$ Correct Answer $$ \frac{-1}{3}$$ or -0.3333333333333333

5.	Significant figures 1. Write the following to 3 significant figures: 0.023575422 Correct Answer 0.0236 or $$2.36\times10^{-2}$$ 2. Write the following to 5 significant figures: 0.41500620 Correct Answer 0.41501 or $$4.1501\times10^{-1}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 3.20551 Correct Answer $$3.21\times10^{0}$$ 2. Write the following in standard form to 2 significant digits: 0.0000000992535 Correct Answer $$9.9\times10^{-8}$$

7.	Significant figures 1. Write the following in preferred standard form to 5 significant digits: 0.004564804 Correct Answer $$4.5648\times10^{-3}$$ 2. Write the following in preferred standard form to 4 significant digits: 193454 Correct Answer $$193.5\times10^{3}$$

8.	Simplify 2 Simplify the following expression: $$ {\left(-2 - 6\right)}^{2} - {\left(4 - 3\right)}^{\left(-5 + 3\right)} $$ Correct Answer $$ 63$$ or 63.0000

9.	Simplify 1 Simplify the following expression: $$ \left(-5 + 3\right)\left(2 + 6\right) + {\left(-4 - 2\right)}^{2} $$ Correct Answer $$ 20$$ or 20.0000

10.	Simplify 2 Simplify the following expression: $$ \frac{{\left(4 - -3\right)}^{2}}{-1 - 2 + \frac{1}{-3}} $$ Correct Answer $$ \frac{-147}{10}$$ or -14.7000